This might be unrelated, but it's a general Glide plugin issue so needs to be said. Make sure you set the "Start the emulation fullscreen" option in the main Project64 settings, since Glide only sanely works fullscreen, it can't render to a window.
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Athlon Thunderbird 1.4GHz 100FSB
384MB PC100 SDRAM
GeForce4 Ti4600 128MB
120GB 7200rpm IBM and 60GB 5400rpm Maxtor IDE hard drives.
Creative SB PCI128
LiteON 16x10x40 CD-RW and Samsung SD-616Q 16x DVD-ROM